Add support for 'Or' logical operator - hacktoberfest

[arrlancore]

We need to add support for the 'Or' logical operator in Minirule to allow for more complex rule conditions.

Tasks

• Add 'Or' keyword token
• Implement 'or' clause in the parser
• Implement visitor for 'or' clause in the interpreter
• Add new keyword token to playground editor config

Implementation Details

1. Add 'Or' keyword token

• Update tokenConfig.ts to include 'Or' in the keywords object
• Add 'Or' to the list of tokens in grammar.ts

2. Implement 'or' clause in the parser

• Modify the condition rule in RuleParser class in grammar.ts to support 'or' conditions
• Update the CONDITION method to handle 'or' clauses

3. Implement visitor for 'or' clause in the interpreter

• Update the visitCondition method in interpreter.ts to evaluate 'or' conditions
• Implement logic to return true if any of the conditions in the 'or' clause are true

4. Add new keyword token to playground editor config

• Update the Monaco editor configuration in the playground to recognize and highlight the 'Or' keyword

Example Usage

rule "Special Offer"
when
  customer.status is "gold"
  or customer.lifetime_value > 10000
then
  apply 15% discount to order.total
end

Acceptance Criteria

• 'Or' keyword is recognized by the parser
• Rules with 'or' conditions are correctly interpreted
• 'Or' keyword is properly highlighted in the playground